Define a `UnpackStrategy` function type in the `SnapshotStore` to give
more control over how an image is unpacked.
Previously, we were creating a 512 GB sparse block file for the initial
file system of a container, which is overkill.
With this change, the vminit image is unpacked to a smaller block file,
while container images are unpacked to the 512 GB block
Follows the same pattern as
https://github.com/apple/container/blob/main/Sources/Helpers/RuntimeLinux/RuntimeLinuxHelper.swift#L71
Signed-off-by: Aditya Ramani <a_ramani@apple.com>
See discussion below for example. For multiple network interfaces in a
single container we'll want to integrate against a containerization that
includes apple/containerization#156.
The change bumps the containerization dependency to 0.2.0 and addresses
the breaking API changes.
```console
% container network
OVERVIEW: Manage container networks
USAGE: container network <subcommand>
OPTIONS:
--version Show the version.
-h, --help Show help information.
SUBCOMMANDS:
create Create a new network
delete, rm Delete one or more networks
list, ls List networks
inspect Display information about one or more networks
See 'container help network <subcommand>' for detailed help.
```